metar.py

import xml.etree.ElementTree as etree
import requests

URL = 'https://aviationweather.gov/adds/dataserver_current/httpparam?dataSource=metars&requestType=retrieve&format=xml&stationString=LKPR&hoursBeforeNow=2'

response = requests.get(URL)

tree = etree.fromstring(response.content)  # convert to etree
for element in tree.findall('.//data/METAR'):
    temperature = element.find('./temp_c').text
    temperature = float(temperature)
    print("{:2.1f}".format(temperature))